US2427256A
Expired / Lapsed
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Optical apparatus for comparing objects
Assignee: H HAUSER A G MASCHF
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Filing: 1942-09-11
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Granted: 1947-09-09
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Expires: 1962-09-11
Abstract
No abstract record available.
Inventors
- 👤 Butscher Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:44
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-08 | 1951-03-10 | 1951-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-08 | 1955-03-10 | 1955-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-08 | 1959-03-10 | 1959-09-09 | $7700.00 | Window Closed / Lapsed |